Exhaust gas purifier



Patented June 18, 1935 UNITED STATES PATENT OFFICE 2,005,249 EXHAUST GAS PURIFIER Chester Tietig, Los Angeles, Calif.

Application February 4,

4 Claims.

This invention relates to a device for purifying the exhaust gases of internal combustion engines, particularly of automobile engines, so that these gases may be respired after purification, without hot exhaust gases, a comparatively small stream,

of hot, pure air, said air being sucked into the stream of exhaust gases by the motive power of the exhaust gases themselves which thereby constitutes an automatic proportioning means.

Fig. 1 shows a longitudinal cross section of the device; and Fig. 2 illustrates one way in which the device may be applied to the exhaustgas line of an automobile engine.

In Figure 1 of the drawing is shown one form of my exhaust gas purifier comprising a Venturi tube In made preferably of cast iron and provided with end flanges II and I2, the flanges being provided with bolt holes l3. The flange l I may be, and preferably isjadapted to fit the exhaust port or cylinder of an internal combustion engine which is to be equipped with my device, such as an automobile engine as illustrated in Fig. 2. The other flange l2 may be and preferably is, adapted to fit the flange of the engine's exhaust manifold. Both flanges preferably are alike so that the de-. vice may be inserted into the exhaust-gas line as a section thereof preferably at a location as close to the exhaust manifold as possible, suitable gaskets being disposed between the joints in accordance with the best mechanical practice.

As illustrated in the cross-sectional view of Fig.

1, the Venturi tube I comprises two oppositely directed flared sections which are united to form a constricted neck I 8. Upon the exterior of the Venturi adjacent and to the rear of the neck I 8 is a flared portion is, the forward face 20 of which contains a plurality of perforations 2| arranged about its circumference. purpose of the portion I9 is to provide a thick body of metal into WhlCh air tubes 22 may be fastened in a manner such that the position of the tubes entering the Venturi are directed at a slight inclination toward the discharge end of the purifier. The air tubes are open at both ends and extend through 1930, Serial No. (01. 60-30) ends 23 lie in proximity to but terminate a spaced distance from the Venturi. By this construction the air entering the air tubes is taken from the zone surrounding the Venturi and consequently will have been warmed by the heat lost by conduction through the wall of the Venturi from the hot exhaust gases passing therethrough.

spark plug, however, be dispensed with.

In the operation of hot combustible vapors which the exhaust gases comprise. Ignition follows and the CO, H2 and atomized oil vapors are substantially, or entirely, burned to CO2 and water.

of the unburned requiring the operation of raise the mixture to comrounding the hot external does not unduly chill the exhaust gases below ignition temperature. This contributes to the emciency of the device and also permits it to be located in the exhaust-gas line, if necessary or desirable, at a point farther removed from the exhaust port of the cylinder where the exhaust gases are not so highly heated.

I claim as my invention:

1. An exhaust gas purifier comprising a Venturi tube having an internal constricted throat, said Venturi tube being adapted to be interposed within and constitute a part of the exhaust-gas line of an internal combustion engine, and an open-ended air tube passing through the wall of the Venturi tube and having one of its ends disposed in proximity to the outer surface of the Venturi tube and its other end communicating with the Venturi tube rearwardly of its throat at the outlet side thereof.

2. An exhaust gas purifier comprising a Venturi tube having an internal constricted throat, said Venturi tube being adapted to be interposed within and constitute a part of the exhaust-gas line of an internal combustion engine, and an open-ended air tube passing through the wall of the Venturi tube and having one of its ends disposed in proximity to the outer surface of the Venturi tube and having its other end communicating with the Venturi tube rearwardly of its throat and at the outlet side thereof, said air tube having its end which communicates with the Venturi tube projecting into the passage of the Venturi tube and directed angularly toward the discharge end of the Venturi tube.

3. An exhaust gas purifier comprising a Venturi tube having an internal constricted throat, said Venturi tube being adapted to be interposed within and constitute a part of the exhaust-gas line of an internal combustion engine, an open-ended air tube passing through the wall of the Venturi tube and having one of its ends disposed in proximity to the outer surface of the Venturi tube and its other end communicating with the Venturi tube rearwardly of its throat at the outlet side thereof, said air tube having its end which communicates with the Venturi tube projecting into the passage of the Venturi tube and directed angularly toward the discharge end of the Venturi tube, and ignition means located within the Venturi tube a short distance rearwardly of the air tube.

4. An exhaust gas purifier comprising a Venturi tube having an internal constricted-throat, said Venturi tube being adapted to be interposed within and constitute a part of the exhaustgas line of an internal combustion engine, and a plurality of open-ended air tubes extending through the wall of the Venturi tube, the portions of said air tubes extending exteriorly of the Venturi tube being bent to dispose the ends of said air tubes in proximity to the outer surface of the Venturi tube, said air tubes having their opposite ends communicating with the Venutri tube at points located a relatively short distance beyond the outlet side of its throat.

CHESTER TIETIG. 

